#include

int main(int argc, const char * argv[]) {

int arr[4][4]={{25,36,78,13},{12,26,88,93},{75,18,22,32},{56,44,36,58}};

int i,j,temp;

printf("主對角線:\n");

for(i=0;i

printf("%d ",arr[i][i]);

putchar("\n");

printf("副對角線:\n");

for(i=0;i

printf("%d ",arr[i][4-i]);

putchar("\n");

printf("交換後:\n");

for(i=0;i

{

temp=arr[0][i];

arr[0][i]=arr[2][i];

arr[2][i]=temp;

}

for(i=0;i

{

for(j=0;j

printf("%d ",arr[i][j]);

putchar("\n");

}

return 0;

}